亙古未有

unprecedented / never seen since ancient times

extending all the way across / running all the way through

throughout time / from ancient times (up to the present)

surname Gu

ancient / old / paleo-

not yet / did not / have not / not / 8th earthly branch: 1-3 p.m., 6th solar month (7th July-6th August), year of the Sheep / ancient Chinese compass point: 210°

is not / has never been / never occurring / unprecedented

to have; there is / (bound form) having; with; -ful; -ed; -al (as in 有意[you3 yi4] intentional)